You da man! :cheers:

Found what I was looking for.

This is how its done if anyone's interested:

x^4 + x^3 -7x^2 - x + 6 = 0

(x^4 - 7x^2 + 6) + x(x^2 - 1)=0

(x^2 -6)(x^2 - 1) + x(x^2 - 1)=0

(x^2 +x - 6)(x^2 - 1)=0

(x + 3)(x - 2)(x^2 - 1)=0

x = -3, x = 2, x= +/-1